be cocky 翘尾巴

“翘尾巴”，汉语词语，字面意思是“stick one's tail up”，比喻骄傲自大，自以为了不起。可以翻译为“be cocky，get stuck-up或be haughty and snooty”等。

例句：

不要取得一点成绩就翘尾巴，你还差得远呢。

Don't get cocky when you've just achieved something. There is much to be desired in your work.